The month in detail
What to expect in September
Spring marks the start of the good season in Rio de Janeiro. Temperatures rise (79°F) and tourists have not yet arrived en masse. Rain risk remains low (23% of days), leaving good room for outdoor activities. A good balance between weather and crowds, even if July (8.3/10) remains theoretically better.
September ranks 5 out of 12 months in Rio de Janeiro. Compared to August: +4°F daytime, 7 pts more rainy days, −1.1h of sun per day.
This month's conditions
What it's like in September
UV index
7 · high
sunscreen and hat advised
Feels like
muggy at times
19°
Sea
24°C
pleasant for swimming
Daylight
11.9h of daylight
Air quality
fair
AQI 47
Compare
Is September the right month?
The best month in Rio de Janeiro is July (8.3/10), 0.2 pt higher than September.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Rio de Janeiro
Expedia →
Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Rio de Janeiro
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.
Country · Brazil
🗣️LanguagePortuguese
💶CurrencyBrazilian Real (R$)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘCheap · 2/5
🌡️ Climate
🌍Climate typeTropical
📈Climate trend ⓘStable
🔥Hottest monthJanuary · 86°F
❄️Coolest monthJuly · 75°F
🌧️Rainiest month ⓘJanuary · 35%
🏝️ Tropical stay
🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘSeason Nov-Apr
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Location
Where is Rio de Janeiro ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
BrazilTropical climate with a 8.3 → 5.4 gap between best and worst month. 10 years of ERA5 data to choose by project.
22.90°S · 43.17°W
Questions
Frequently asked questions
What is the best time to visit Rio de Janeiro?
July is the best month with 75°F highs, 64°F lows, 6.1h of sunshine and 13.0% rainy days. The months of July & May offer comparable conditions.
How many hours of sunshine does Rio de Janeiro get in July?
Rio de Janeiro averages 6.1 sunshine hours per day in July. It is the sunniest month with a climate score of 7.8/10.
What is the rainiest month in Rio de Janeiro?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Rio de Janeiro in July?
In July, overnight lows reach 64°F, while afternoon highs average 75°F.
Is Rio de Janeiro good in winter?
In winter (December-February), Rio de Janeiro scores 6.1/10 on average — Acceptable conditions for cultural visits.. The best month overall remains July with a score of 7.8/10.
When should you avoid Rio de Janeiro?
January is the most difficult month to visit Rio de Janeiro, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Rio de Janeiro in September?
In September, the sea averages 74°F in Rio de Janeiro: pleasant for swimming. Swimming is pleasant without a wetsuit.
Do you need sun protection in Rio de Janeiro in September?
The average UV index reaches 7 in September in Rio de Janeiro (high), with about 11.9h of daylight. Sunscreen and hat advised.